Method for detecting OTDR curve tail end event to locate optical fibre break point in online mode
US9948385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2014 |
| Grant date | Apr 17, 2018 |
| Priority date | — |
| Expiry date | Jun 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/0791
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method for detecting an OTDR curve tail end event to locate an optical fiber break point in an online mode, comprising following steps: 1, an OTDR emits detection light to an optical fiber operation link, and receives reflection light to form reflection sampling point data containing tail end event; 2, head end reflection point in sampling point is found out; 3, traversal is carried out to find search region end point; 4, segmented line fitting is carried out in region of [search region end point, head end reflection point] in reversed direction, start point of section of line meeting predetermined condition is used as a search region start point; 5, if absolute value of difference between largest sampling value in search region and sampling value of search region start point is larger than second preset threshold value, tail end event is judged as reflection tail end event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.